Description

This PR removes the automatic, import-time side-effects of importing anchor.runtime by separating module import from SDK activation, requiring an explicit anchor.runtime.activate() call.

Acceptance Criteria

• Remove automatic activation during module import.
• Require an explicit activate() call.
• Prevent monkeypatching until activation occurs.
• Update documentation and examples to use explicit activation.
• Preserve existing runtime behavior after activation.

Changes

• Runtime SDK Entrypoint (anchor/runtime/__init__.py):
  • Removed the automatic import-time invocation of activate() and _load_custom_providers_from_policy().
  • Moved custom provider policy loading inside the activate() method, ensuring policy settings are successfully loaded when the SDK is explicitly enabled.
  • Updated the module's docstring reference examples to instruct developers on using explicit activation.
• Smoke Test Suite (tests/runtime/test_runtime_interceptors.py):
  • Updated the tests to assert that rt.get_session_stats()["status"] is "inactive" immediately after import.
  • Verifies that the status changes to "active" and interceptor monkeypatching is configured after rt.activate() is explicitly called.
• Documentation & Integration Examples: Confirmed that all built-in examples (e.g. python-openai-app.md, langchain-agent.md, installation.md) are already fully compliant with the explicit activation pattern.

Related Issues

Fixes #25